US PATENT SUBCLASS 29 / 890.128
.~.~.~.~ Including machining or drilling

Current as of: June, 1999
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29 /   HD   METAL WORKING

592  DF  METHOD OF MECHANICAL MANUFACTURE {54}
890.12  DF  .~ Valve or choke making {5}
890.124  DF  .~.~ With assembly, disassembly or composite article making {3}
890.126  DF  .~.~.~ With material shaping or cutting {4}
890.128.~.~.~.~ Including machining or drilling

DEFINITION

Classification: 29/890.128

Including machining or drilling:

(under subclass 890.126) Process wherein the material shaping operation includes the use of a cutter to remove excess material to produce the desired shaped valve or component thereof.

(1) Note. The cutter herein is generally a milling, drilling, grinding, broaching or planing tool.